Sandpaper Prints



Cindy Hopper has a great idea for a kid-friendly craft. Have your child make a crayon picture on sandpaper. Place a piece of cardboard inside a white t-shirt. Then place the sandpaper face down with a hot iron on top. After thirty seconds of heat and a run through the washing machine, you've got a t-shirt front designed by your own child! Link -via Craft

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Lori Dajose, CalTech Communications Officer: "The original 'rabbit illusion' was a tactile illusion," Dajose says. "You tap someone’s arm very quickly in two locations (let’s say point A and point B) repeatedly. When their eyes are closed, even though the tapping is only happening in two locations, they can feel the tapping 'hop' linearly across multiple locations on their arm between point A and point B. So for the audiovisual illusion, the 'rabbit' has to do with how the flash 'hops' across the screen."

From an article in Popular Mechanics­.
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